/usr/share/games/minetest/mods/mobf/mobf_settings/fstk/ui_mod.lua is in minetest-mod-mobf-core 2.5.1-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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--Copyright (C) 2014 sapier
--
--self program is free software; you can redistribute it and/or modify
--it under the terms of the GNU Lesser General Public License as published by
--the Free Software Foundation; either version 2.1 of the License, or
--(at your option) any later version.
--
--self program is distributed in the hope that it will be useful,
--but WITHOUT ANY WARRANTY; without even the implied warranty of
--MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
--GNU Lesser General Public License for more details.
--
--You should have received a copy of the GNU Lesser General Public License along
--with self program; if not, write to the Free Software Foundation, Inc.,
--51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
local ui_registry = {}
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local function add(self, child)
assert(child ~= nil)
if (self.childlist[child.name] ~= nil) then
return false
end
self.childlist[child.name] = child
return child.name
end
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local function delete(self, child)
if self.childlist[child.name] == nil then
return false
end
self.childlist[child.name] = nil
return true
end
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local function set_default(self, name)
self.default = name
end
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local function find_by_name(self, name)
return self.childlist[name]
end
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local function hide(self)
for key,value in pairs(self.childlist) do
if type(value.hide) == "function" then
value:hide()
end
end
end
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local function update(self)
local formspec = ""
local active_toplevel_ui_elements = 0
for key,value in pairs(self.childlist) do
if (value.type == "toplevel") then
local retval = value:get_formspec()
if retval ~= nil and retval ~= "" then
active_toplevel_ui_elements = active_toplevel_ui_elements +1
formspec = formspec .. retval
end
end
end
-- no need to show addons if there ain't a toplevel element
if (active_toplevel_ui_elements > 0) then
for key,value in pairs(self.childlist) do
if (value.type == "addon") then
local retval = value:get_formspec()
if retval ~= nil and retval ~= "" then
formspec = formspec .. retval
end
end
end
end
if (active_toplevel_ui_elements == 0) then
core.log("WARNING: not a single toplevel ui element active switching " ..
"to default")
self.childlist[self.default]:show()
formspec = self.childlist[self.default]:get_formspec()
end
core.show_formspec(self.playername, self.formname, formspec)
end
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local ui_metatable = {
add = add,
delete = delete,
set_default = set_default,
find_by_name = find_by_name,
hide = hide,
update = update
}
ui_metatable.__index = ui_metatable
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function create_ui(playername, unique_id)
if (ui_registry[playername] == nil) then
ui_registry[playername] = {}
end
if ui_registry[playername][unique_id] ~= nil then
return nil
end
local self = {}
setmetatable(self, ui_metatable)
ui_registry[playername][unique_id] = self
self.childlist = {}
self.default = nil
self.formname = unique_id
self.playername = playername
return self
end
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function get_ui_by_unique_id(playername, unique_id)
if (ui_registry[playername] == nil) then
return nil
end
return ui_registry[playername][unique_id]
end
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-- Internal functions not to be called from user
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
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local function handle_buttons(player, formname, fields)
if not player:is_player() then
return
end
local playername = player:get_player_name()
if playername == nil or
ui_registry[playername] == nil then
return
end
if ui_registry[playername][formname] == nil then
return
end
for key,value in pairs(ui_registry[playername][formname].childlist) do
local retval = value:handle_buttons(fields)
if retval then
ui_registry[playername][formname]:update()
return
end
end
end
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local function player_leave(player)
if not player:is_player() then
return
end
local playername = player:get_player_name()
if playername == nil then
return
end
ui_registry[playername] = nil
end
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minetest.register_on_player_receive_fields(handle_buttons)
minetest.register_on_leaveplayer(player_leave)
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